Details

Autor(en) / Beteiligte

• de Jesus, Anderson Alles
• de Santana Souza, Domingos Fabiano
• de Oliveira, Jackson Araújo
• de Deus, Marcell Santana
• da Silva, Maxwell Gomes
• Franceschi, Elton
• da Silva Egues, Silvia Maria
• Dariva, Claudio

Titel

Mathematical modeling and experimental esterification at supercritical conditions for biodiesel production in a tubular reactor

Ist Teil von

• Energy conversion and management, 2018-09, Vol.171, p.1697-1703

Ort / Verlag

Oxford: Elsevier Ltd

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •A model to analyze the alcohololysis in tubular reactor at supercritical conditions.•Mixture density at the experimental conditions was modeled by the Peng-Robinson EOS.•The model could predict the experimental data at different conditions.•Dispersion effect was evaluated using the Peclet number.•The dispersion effect was relevant to correlate the experimental data. The non-catalytic esterification of oleic acid with supercritical ethanol was carried out in a tubular reactor at different temperatures (150–300 °C), molar ratios (1:1–6:1) and volumetric flow rates (0.001–0.005 dm3/min). The highest free fatty acid conversion was obtained at 300 °C, ethanol to oleic acid molar ratio of 6:1 and fixed pressure of 150 bar. A phenomenological axial dispersion model was developed to evaluate the intrinsic effects of the operating variables on the conversion of oleic acid to ethyl oleate. The density of the reaction mixture was estimated using the Peng-Robinson equation of state. Distinct experimental data set were used for parameter estimation and validation of the model. The results demonstrated that the correction of the flow velocity is necessary, and that the axial dispersion effect cannot be neglected.